My trying-to-be-constructive criticism is that I think you're paying too much attention to the fabric textures and not enough to the fabric tones. Your mountain fabric is lighter and brighter than your sky fabric, and it should be the other way around. Your grass fabric is neat, but there's no depth-of-field (the grasses don't get smaller as the picture deepens) and the line where the grass ends at the top is a little abrupt - maybe some thread painting there would help both issues.
All in all, I think your quilt is really neat!!! I LOVE the block fabric you picked for the house!